<template>
    <div>
          <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!--卡片试图-->
        <el-card>
         <!--警告-->
           <el-alert show-icon title="注意：只允许为第三级分类设置相关参数" type="warning" :closable="false"></el-alert>

           <!--选择商品--->
           <el-row class="cat_opt">
             <el-col>
               <span>选择商品分类</span>
               <!--选择商品分类的级联选择框-->
                <el-cascader
                expand-trigger="hover"
                 v-model="selectCatekeys"
                 :options="catelist"
                 :props="cateProps"
                 @change="handleChange"></el-cascader>
             </el-col>
           </el-row>

           <!-- tab页签区 -->
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <!-- 添加动态参数的面板 -->
                <el-tab-pane label="动态参数" name="many">
                    <!-- 添加参数的按钮 -->
                    <el-button type="primary" size="mini"
                    :disabled="isBtnDisabled"
                    @click="adddialogVisible=true"
                    >添加参数</el-button>
                    <!-- 动态参数的表格 -->
                    <el-table :data="manyTableData" border stripe>
                        <!-- 展开行 -->
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                            <!--循环渲染tag标签-->
                               <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                            <!--输入的文本框-->
                               <el-input
                                class="input-new-tag"
                                v-if="scope.row.inputVisible"
                                v-model="scope.row.inputValue"
                                ref="saveTagInput"
                                size="small"
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)"
                                >
                               </el-input>
                            <!--添加按钮-->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!-- 索引列 -->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                               <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                               <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>

                    </el-table>
                    </el-tab-pane>
                <!-- 添加静态属性的面板 -->
                <el-tab-pane label="静态属性" name="only">
                    <!-- 添加属性的按钮 -->
                    <el-button type="primary" size="mini"
                :disabled="isBtnDisabled"
                @click="adddialogVisible=true"
                >添加属性</el-button>
                                    <!-- 静态属性的表格 -->
                    <el-table :data="onlyTableData" border stripe>
                        <!-- 展开行 -->
                          <el-table-column type="expand">
                            <template slot-scope="scope">
                            <!--循环渲染tag标签-->
                               <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                            <!--输入的文本框-->
                               <el-input
                                class="input-new-tag"
                                v-if="scope.row.inputVisible"
                                v-model="scope.row.inputValue"
                                ref="saveTagInput"
                                size="small"
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)"
                                >
                               </el-input>
                            <!--添加按钮-->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!-- 索引列 -->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                               <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                               <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>

                    </el-table>
                </el-tab-pane>
            </el-tabs>
        </el-card>

        <!-- 添加参数的对话框 -->
        <el-dialog
             :title="'添加'+ titleText"
             :visible.sync="adddialogVisible"
             width="50%"
             @close="addDialogClosed"
             >
             <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                  <el-input v-model="addForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
             <span slot="footer" class="dialog-footer">
               <el-button @click="adddialogVisible = false">取 消</el-button>
               <el-button type="primary" @click="addParams">确 定</el-button>
             </span>
        </el-dialog>

                <!-- 修改参数的对话框 -->
        <el-dialog
             :title="'修改'+ titleText"
             :visible.sync="editdialogVisible"
             width="50%"
             @close="editDialogClosed"
             >
             <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                  <el-input v-model="editForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
             <span slot="footer" class="dialog-footer">
               <el-button @click="editdialogVisible = false">取 消</el-button>
               <el-button type="primary" @click="editParams">确 定</el-button>
             </span>
        </el-dialog>
    </div>
</template>
<script>
// import { log } from 'console'
export default {
    data(){
        return{
             // 商品分类列表
            catelist:[],
            // 级联选择框
            cateProps:{
                value:'cat_id',
                label:'cat_name',
                children:'children'
            },
            // 级联选择框双向绑定的数组
            selectCatekeys:[],
            // 被激活的页签的名称
            activeName:'many',
            // 动态参数的数据
            manyTableData:[],
            // 静态属性的数据
            onlyTableData:[],
            // 控制添加对话框的显示与隐藏
            adddialogVisible:false,
            // 添加参数的表单数据对象
            addForm:{
                attr_name:''
            },
            addFormRules:{
                attr_name:[
                    {required:true,message:"请输入参数名称",trigger:'blur'}
                ]
            },
            editdialogVisible:false,
            // 修改的的数据对象
            editForm:{},
            editFormRules:{
                attr_name:[
                    {required:true,message:"请输入参数名称",trigger:'blur'}
                ]
            },
            // 控制按钮的显示与隐藏
            inputVisible:false,
            // 文本的内容
            inputValue:''
           
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
       async getCateList(){
            const {data:res}=await this.$http.get('categories')
            if(res.meta.status!==200){
                return this.$$message.error("获取商品分类失败")
            }
            this.catelist=res.data
            console.log(this.catelist);
        },
        // 级联选择框变化会触发
        handleChange(){
           this.getParamsData()
        },
                // tab页签事件的处理函数
        handleTabClick(){
            console.log(this.activeName);
            this.getParamsData();
        },

        async getParamsData(){
         if(this.selectCatekeys.length!==3){
            this.selectCatekeys=[]
            this.manyTableData=[]
            this.onlyTableData=[]
            return
        }
        // 证明我们选择了三级分类
            console.log(this.selectCatekeys);
            //割据所选id获取对应的面板属性
            const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,   {params:{sel: this.activeName }})
            if(res.meta.status!==200){
                return this.$message.error('获取参数失败')
            }
            res.data.forEach(item=>{
                item.attr_vals=item.attr_vals ? item.attr_vals.split(' '):[]
                // 控制文本框的显示与隐藏
                item.inputVisible=false
                item.inputValue=''
            })
            console.log(res.data)
            if(this.activeName==='many'){
                this.manyTableData=res.data
            }else{
                this.onlyTableData=res.data
            }
            },
            // 监听对话框的关闭
        addDialogClosed(){
             this.$refs.addFormRef.resetFields()
        },
        addParams(){
            this.$refs.addFormRef.validate(async valid=>{
                if(!valid)return
                const {data:res}=await this.$http.post(`categories/${this.cateId}/attributes`,{
                    attr_name:this.addForm.attr_name,
                    attr_sel:this.activeName
                })
                if(res.meta.status!==201){
                    return this.$message.error("添加参数失败")
                }
                this.$message.success('添加参数成功')
                this.adddialogVisible=false
                this.getParamsData()
            })
        },
        async showEditDialog(attr_id){
          const {data:res}=await  this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{ params:{attr_sel: this.activeName }})
            if(res.meta.status!==200){
                return this.$message.error("获取参数信息失败")
            }
            this.editForm=res.data
            this.editdialogVisible=true
        },
        // 重置修改的表单
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        editParams(){
            this.$refs.editFormRef.validate(async valid=>{
                if(!valid)return 
                const {data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{attr_name:this.editForm.attr_name,attr_sel:this.activeName
                })
                if(res.meta.status!==200){
                    return this.$message.error("修改参数失败")
                }
                this.$message.success("修改参数成功")
                this.getParamsData()
                this.editdialogVisible=false
            })
        },
       async removeParams(attr_id){
          const confirmResult=await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
             confirmButtonText: '确定',
             cancelButtonText: '取消',
             type: 'warning'
        }).catch(err=>err)

        if(confirmResult!=='confirm'){
            return this.$message.info('已取消删除')
        }

        // 删除的业务逻辑
      const {data:res}=await  this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)

      if(res.meta.status!==200){
          return this.$message.error("删除参数失败")
          
      }
      this.$message.success("删除成功")
      this.getParamsData()
        },
        // 文本框失去焦点
       async handleInputConfirm(row){
            // console.log("ok");
            if(row.inputValue.trim().length===0){
                row.inputValue=''
                row.inputVisible=false
                return
            }
            // 如果没有return，做后续处理
            row.attr_vals.push(row.inputValue.trim())
            row.inputValue=''
            row.inputVisible=false
            // 需要发起请求
            this.saveAttrVals(row)
        },
       async saveAttrVals(row){
              const {data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
                attr_name: row.attr_name,
                attr_sel: row.attr_sel,
                attr_vals: row.attr_vals.join(' ')
            })

            if(res.meta.status!==200){
                return this.$message.error('修改参数项失败')
            }
            this.$message.success('修改参数成功')
        },
        showInput(row){
            row.inputVisible=true
            // 让文本框自动获得焦点
            // nextTick方法是页面重新渲染后，才会指定回调函数
             this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
        },
        // 删除对应的参数可选项
        handleClose(i,row){
            row.attr_vals.splice(i,1)
            this.saveAttrVals(row)
        }

    },
      computed:{
        // 如果按钮需要被禁用，则返回true,否则返回false
        isBtnDisabled(){
            if(this.selectCatekeys.length!==3){
                return true
            }
            return false
        },
        cateId(){
            if(this.selectCatekeys.length===3){
                return this.selectCatekeys[2]
            }
            return null
        },
        titleText(){
            if(this.activeName==='many'){
                return '动态参数'
            }
            return '静态属性'
        }
    },
}
</script>
<style scoped>
.cat_opt{
    margin: 15px 0;
}
.el-tag{
    margin: 10px;
}

.input-new-tag {
    width: 120px;
}

</style>